forked from WebKit/WebKit
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathArgList.cpp
More file actions
123 lines (104 loc) · 3.58 KB
/
ArgList.cpp
File metadata and controls
123 lines (104 loc) · 3.58 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
/*
* Copyright (C) 2003-2021 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "ArgList.h"
#include "JSCJSValueInlines.h"
using std::min;
namespace JSC {
void MarkedArgumentBufferBase::addMarkSet(JSValue v)
{
if (m_markSet)
return;
Heap* heap = Heap::heap(v);
if (!heap)
return;
m_markSet = &heap->markListSet();
m_markSet->add(this);
}
void ArgList::getSlice(int startIndex, ArgList& result) const
{
if (startIndex <= 0 || startIndex >= m_argCount) {
result = ArgList();
return;
}
result.m_args = m_args + startIndex;
result.m_argCount = m_argCount - startIndex;
}
template<typename Visitor>
void MarkedArgumentBufferBase::markLists(Visitor& visitor, ListSet& markSet)
{
ListSet::iterator end = markSet.end();
for (ListSet::iterator it = markSet.begin(); it != end; ++it) {
MarkedArgumentBufferBase* list = *it;
for (int i = 0; i < list->m_size; ++i)
visitor.appendUnbarriered(JSValue::decode(list->slotFor(i)));
}
}
template void MarkedArgumentBufferBase::markLists(AbstractSlotVisitor&, ListSet&);
template void MarkedArgumentBufferBase::markLists(SlotVisitor&, ListSet&);
void MarkedArgumentBufferBase::slowEnsureCapacity(size_t requestedCapacity)
{
setNeedsOverflowCheck();
auto checkedNewCapacity = CheckedInt32(requestedCapacity);
if (UNLIKELY(checkedNewCapacity.hasOverflowed()))
return this->overflowed();
expandCapacity(checkedNewCapacity);
}
void MarkedArgumentBufferBase::expandCapacity()
{
setNeedsOverflowCheck();
auto checkedNewCapacity = CheckedInt32(m_capacity) * 2;
if (UNLIKELY(checkedNewCapacity.hasOverflowed()))
return this->overflowed();
expandCapacity(checkedNewCapacity);
}
void MarkedArgumentBufferBase::expandCapacity(int newCapacity)
{
setNeedsOverflowCheck();
ASSERT(m_capacity < newCapacity);
auto checkedSize = CheckedSize(newCapacity) * sizeof(EncodedJSValue);
if (UNLIKELY(checkedSize.hasOverflowed()))
return this->overflowed();
EncodedJSValue* newBuffer = static_cast<EncodedJSValue*>(Gigacage::tryMalloc(Gigacage::JSValue, checkedSize));
if (!newBuffer)
return this->overflowed();
for (int i = 0; i < m_size; ++i) {
newBuffer[i] = m_buffer[i];
addMarkSet(JSValue::decode(m_buffer[i]));
}
if (EncodedJSValue* base = mallocBase())
Gigacage::free(Gigacage::JSValue, base);
m_buffer = newBuffer;
m_capacity = newCapacity;
}
void MarkedArgumentBufferBase::slowAppend(JSValue v)
{
ASSERT(m_size <= m_capacity);
if (m_size == m_capacity)
expandCapacity();
if (UNLIKELY(Base::hasOverflowed())) {
ASSERT(m_needsOverflowCheck);
return;
}
slotFor(m_size) = JSValue::encode(v);
++m_size;
addMarkSet(v);
}
} // namespace JSC